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Tidal Datum of Kachemak Bay - Harbormaster Complex in Homer, AK

National Oceanic and Atmospheric Administration (NOAA) - Historic Tide Database
NOS Station ID 9455500 Seldovia, AK
Dates 5/1/2014 - 5/30/2014


Established May 24, 1964

Latitude 59º 26.4’ N

Longitude 151º 43.2’ W

Mean Range 15.53 ft.

Diurnal Range 18.04 ft.


TIDAL DATUM of KACHEMAK BAY is a public art sculpture that was commissioned by the City of Homer, AK as part of the 1% for Art Funding program. It is a suspended sculpture that hangs above the entryway to the new Harbormaster Office Complex on the Homer Spit. The tidal range in Kachemak Bay is one of the greatest in the world. Tidal Datum is a data sculpture that represents a full cycle of tidal ebbs and floods in three dimensions. Twenty-nine daily tide charts of the verified water level recorded at the National Oceanographic & Atmospheric Administration’s tide station in Seldovia were translated into hand bent steel and framed in a wood structure made from walnut. At the lowest, the water level is 4’ below sea level and 21’ above sea level at its highest.”

The source data and station information for the NOAA's Seldovia, AK Tide Station can be accessed here.


the Homer Spit in Kachemak Bay

NOAA tide chart from Seldovia Station

new harbormaster complex under construction

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